I used the following information. It is the manual override process. You could also remove power to the controller and then reconnect to see if the beeping stops.

LIPPERT

COMPONENTS, INC.

Error codes
During operation when an error occurs the board will use the led’s to indicate where the problem exists.
For motor specific faults the green led will blink 1 time for motor 1, and 2 times for motor 2. The red led
will blink from 2 to 9 times depending on the error code.
The error codes are as follows:
2 Battery drop out: Battery capacity low enough to drop below 6 volts while running
3 Low battery: Voltage below 8 volts at start of cycle
4 High battery: Voltage greater than 18 volts
5 Excessive motor current: High amperage, also indicated by 1 side of slide continually stalling.
6 Motor short circuit: Motor or wiring to motor has shorted out.
8 Hall signal not present: Encoder is not providing a signal. Usually a wiring problem.
9 Hall power short to ground: Power to encoder has been shorted to ground. Usually a wiring problem.
When an error code is present, the board needs to be re-set. Energizing the extend/retract switch resets the board. Energize the extend/retract switch again for normal operation.
WARNING!
DO NOT MOVE THE RV UNLESS THE MOTORS ARE PLUGGED IN!
revb031811

Manual Override - C1 & C2 versions

1. Electronic Manual Override (available on board revision C1 and newer)
Locate the circuit board. Press the “mode button” six times quickly, press a 7th time and hold for approximately5 seconds.

The red and green LED lights will begin to flash, confirming the override mode.
Release mode button.
Back inside coach; use the normal slide control switch to retract the room.
A video demonstrating this technique can be found on the internet.
Follow this link: Schwintek In-Wall Slide System (Trouble Shooting Tips) By Lippert Components. - YouTube

2. Manually push room in override
Locate the circuit board.
Unplug both motors from circuit board (releases motor brake).
Push or pull slide room in as desired; Larger rooms may require several people to push.
Keep both sides of room relatively even.
When room is completely in, plug both motors back in to the control board (this applies
brake for road travel).

3. Disengage motors, manually retract room and travel lock.
Repeat this process for both sides of slide room.
Push or pull room back in to opening, keep both sides relatively even.
The room must be travel locked to keep room in place for road travel.
A video demonstrating this technique can be found on the internet.
Follow this link Schwintek In-Wall Slide System (Trouble Shooting Tips) By Lippert Components. - YouTube
Mode Button
Motor Retention Screw
1/2”
Pull the motor up until
Bend back wipe seal and disengaged, about ½”
visually locate motor
Locate and remove motor retention screw
located near top of each vertical column.
Trouble shooting flow chart
Checking Fuses
The Schwintek Inwall Slide requires a minimum of 30 amp fuse. Check the 12 volt fuse box for blown, and replace any if necessary. Consult the rv manufacturers documentation for the location of the 12 volt fuse box, and the location of the Room Slide Controller’s fuse. If the fuse blows immediately upon replacement, there is a problem with the wiring to the Inwall Slide control box. Have qualified service personnel check and repair.
Obstructions
Check outside the rv for possible obstructions: tree, post, car, etc… Check inside the rv for any obstructions: luggage, furniture, open cabinets, etc… Also check for smaller objects that may be wedged under the floor or in the sides of unit. Remove obstructions before proceeding.
Error Codes
Consult rv manufacturer’s documentation for the location of the Inwall Slide Controller. See page 1 for a description of the error codes, and possible problems.
Low Voltage
The Schwintek Inwall Slide Controller is capable of operating the room with as little as 8 volts. But at these lower voltages the amperage requirement is greater. Check voltage at the controller. If voltage is lower than 11 volts, it is recommended that the battery be placed on a charger until it is fully charged. It may be possible to ’jump’ the rv’s battery temporarily to extend or retract the room. Consult the rv manufacturer’s owners manual on the procedure for ‘jumping’ or charging the battery.

**********Never ‘jump’ or charge the battery from the power connections on the Inwall
Controller. Always do this at the battery.*****************
Only 1 side moving
The Schwintek Inwall Room Slide has a separate motor to operate each side of the room. Does only 1side of the room move a short distance (2 to 4 inches) and stop.
Will non moving side move with help?

If only 1 side of the room is moving, then with someone’s assistance press the switch to extend or retract the room while pushing the non moving side in the appropriate direction. On larger rooms it may be necessary to have 2 or more people pushing the room.

Non moving side moved manually
Try to push the non moving side in and out. If a motor shaft has broken then it will be possible to move that side of the room several inches by hand. Larger rooms may require several people to push.

Debris in the rack
Check all 4 gear racks on the side of the room for debris.
Do status led’s light
Consult the rv manufacturers documentation for the location of the Room Slide Controller. When the room slide direction switch is actuated, do the status led’s light up. Check this in both the extend and retract modes.
IF YOU HAVE ANY PROBLEMS OR QUESTIONS CONSULT YOUR LOCAL AUTHORIZED
DEALER OR CALL LIPPERT AT:
(866) 524-7821.

. You could also remove power to the controller and then reconnect to see if the beeping stops.

Finally got back to the RV and removed *all* wires coming into the switch and the beeping continued. So I removed the screws holding it to the wall and will place in truck tonight so I can sleep. Didn't get a chance to call Lippert. I'll make time on Monday to do that.

How could it continue to beep with " no " power to it? When you took it off the wall and moved away from the camper it was still beeping?

This is SOooooo embarrassing: once the controller was removed there was still that beeping. The further I walked away with the controller the quieter the beeping was. I placed it up to my ear and guess what? No beeping.

So where the h*ll was that beeping coming from?

It was the Auto Level control beeping for me to Acknowledge some condition by pressing Enter.

Hell getting old....now where's that hearing aid?

But I now do know a lot about that controller!

Thanks *everyone* for the help and forgive me for the wild goose chase!

Sorry, but that is so hilarious!! I know the feeling. My wife and I had just bought a used Toyota Camry and were shopping at a Home Depot. When we went to our car in the parking lot we hit the remote to unlock the doors and we heard the car beep but the doors wouldn't open. We hit the remote and it beeped again but the doors wouldn't open even though we kept pulling on the handle. We finally realized that our car was the next one over from the one we had been trying to enter. The two cars sat side by side and were identical. How weird is that? I'm so thankful that the owners were not approaching as we tried to enter their car.